Sensor over limit - Changing Device Health Settings by itself

Hello Everyone

after upgrading my LibreNMS to Version|1.51-18-geb8600e - Thu May 02 2019 16:50:18 GMT-0400|

|DB Schema|2019_02_10_220000_add_dates_to_fdb (132)|
|Web Server|nginx/1.10.3|
|PHP|7.2.15-1+ubuntu16.04.1+deb.sury.org+1|
|MySQL|10.0.36-MariaDB-0ubuntu0.16.04.1|
|RRDtool|1.5.5|

We get alert on our PDU and when I disable Health sensor , They will back on and parameter will change after a day and again we will get alert

This picture is after changing the parameter

The picture after 24h

2019-04-30 03:08:03 alert 172.16.8.229 Issued recovery for rule ‘Sensor over limit’ to transport ‘mail’ System
2019-04-30 03:04:02 alert 172.16.8.229 Issued critical alert for rule ‘Sensor over limit’ to transport ‘mail’ System
2019-04-30 02:38:02 alert 172.16.8.229 Issued recovery for rule ‘Sensor over limit’ to transport ‘mail’ System
2019-04-30 02:33:02 alert 172.16.8.229 Issued critical alert for rule ‘Sensor over limit’ to transport ‘mail’

we just need to Monitor current .
how can I fix this issue ?